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restore existing overlapping overflow (#24010)

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Jack May 2022-03-30 15:21:51 -07:00 committed by GitHub
parent 125f9634fd
commit b741b86403
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1 changed files with 3 additions and 2 deletions
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5
programs/bpf_loader/src/syscalls.rs
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@ -1492,9 +1492,10 @@ impl<'a, 'b> SyscallObject<BpfError> for SyscallKeccak256<'a, 'b> {
/// This function is incorrect due to arithmetic overflow and only exists for
/// backwards compatibility. Instead use program_stubs::is_nonoverlapping.
#[allow(clippy::integer_arithmetic)]
fn check_overlapping_do_not_use(src_addr: u64, dst_addr: u64, n: u64) -> bool {
(src_addr <= dst_addr && src_addr.saturating_add(n) > dst_addr)
|| (dst_addr <= src_addr && dst_addr.saturating_add(n) > src_addr)
(src_addr <= dst_addr && src_addr + n > dst_addr)
|| (dst_addr <= src_addr && dst_addr + n > src_addr)
}
fn mem_op_consume<'a, 'b>(